Concentrator.



No. 673,808. Patented May 7, 19m.

0. e. WHEBRY.

CDNCENTRATOR.

(Application filed Apr. 21, 1900,\ {No Model.) 2 Sheels-$heet l.

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Patented May- 7, IBM. D. G. WHERRY.

CONCENTRATOR.

Application filed Ap 2 Sheets-Sheet 2.

No Model.)

Winemes,

rrnn STATES Fries.

DAVID G. Wl-IERRY, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TO GEORGE M. WVOOLEY, OF ERIE, COLORADO.

CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 673,808, dated May '7, 1901. Application filed April 21, 1900. Serial No. 13,694. (No model.)

To all whom it may concern:

Be it known that I, DAVID G. WVHERRY, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Concentrators; and I do declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in concentrators 5 and it consists of the features, arrangements, and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure l is a top or plan view of my improved concentrator. Fig. 2 is a side elevation of the same, the frame being partly broken away and the cam-shaft being shown in section, taken on the line X X, Fig. 1. Fig. 3 is a fragmentary section taken on the line Y Y, Fig. 1. Fig. 4 is'an elevation of the upper part of the machine, showing the screen for grading the material previous to its passage to the amalgamating'plates. This view is taken from the side of the machine opposite that shown in Fig. 2. Fig. 5 is a central vertical section taken on the line X X, Fig. 1.

Similar reference characters indicating corresponding parts in the views, let the numeral 4 designate a suitable stationary supporting-frame, to which is attached a short vertical post or stub-shaft 3, upon which is journaled a hollow shaft 28, to which are secured a number of radial bars 5. To the outer extremities of the bars 5 is attached a ring or band 6, upon which are mounted a number of riffled concentrating sections or tables 7. These tables are sector-shaped and are arranged about a central vertical axis, passing through the hollow shaft 28, to which are attached the inner extremities of the radial bars 5, as aforesaid. Each table-section 7 has an outer peripheral flange 7 and an inadjusted at will.

ner peripheral flange 7 To the extremities of the flange 7 are attached vertical arms 8, provided with slots 8, through which pass bolts 9, which enter the ring 6. To the central part of the peripheral flange 7 is attached a depending arm 10, whose lower extremity is provided with a ball engaging a socket 12, secured to a bar 5 In view of the construction just described it is evident that by loosening the bolts 9 the table-sections may be Each table-section is provided with a number of parallel circular riflies 7. The table-sections are given a bumping action by a cam 13, mounted on a shaft 14, Whose outer extremity is provided with a pulley 15, which may be connected with any suitable motor. As shown in the drawings, one of the bars 5 occupies a position in the path of the cam. The opposite side of this bar is engaged by one extremity of a coil-spring 16, whose opposite extremity surrounds a bolt 17,to which the springis secured.

This bolt engages a threaded opening formed in an upright bar 18. The tension of the spring may be regulated by turning the bolt. As soon as the cam releases the bar 5 the recoil of the spring returns the revolubly-mov. able frame to its normal position, causing one of the bars to strike against a stationary bar 19, termed a bumper. The movement of the tables when actuated by the cam is in the direction indicated by the arrows in Fig. 1, while the return or reverse movement imparted by the spring 16 is in the opposite direction. The extremity A of each table, located in the direction indicated by the arrow, should be lower than the opposite extremity B. The extremity A of each tablesection is provided with a stop-flange C, while the upper extremity of each section is provided with a trough D, in which the concentrates are collected and from which they may be discharged intoasuitable receptacle. (Not shown.) The material to be treated is discharged upon the extremity A of each table from an amalgamatingplate 20, provided with a discharge-extremity 20, which deposits the material at the part of the table-extremityAnearest the center. The outer edge or periphery of each table is preferably lower than itsinneredge orperiphery. The gangue is discharged over the outer edge of the table,while the concentrates are caught by the rifiles and carried upwardly into the trough D of each table-section.

The material to be treated is first fed to a spiral screen 22, mounted on the hollow shaft 28. ence to grading or sizing the material to be discharged upon the different table-sections. For instance, the part 22 of the screen, where the material is first discharged, is provided with finer or smaller openings or perforations than the part 22, to which the material subsequently passes. Underneath the screen parts 22 and 22 are chutes 23, which conduct the material passing through the screens to the concentrating-plates 20 below. Hence the material which passes through the screen part 22 is finer than the material which passes through the screen part 22, while the material which escapes the last-named screen is coarsest and is conducted by the unperforated part 22 of the screen-plate to the amalgamating-plate 2O underneath. The amalgamating-plates are inclined to conduct the material to the extremities A of the different table-sections, as aforesaid.

The necessary water for treating the material is discharged into the hollow shaft 28, which is provided with a plug 28 to prevent the water from escaping at the bottom of the shaft. From this shaft lead conduits 2.4, which carry water to the different parts of the screen 22, and conduits 25, which distribute water upon the difierent table-sections.

The amalgamating-plates are intended to catch the free gold, while the riffled table sections catch the remainder of the values.

While I have shown three table-sections in the drawings, it is evident that a less or greater number of these sections may be employed, as desired.

It must be understood that I do not limit the invention to the details of construction herein shown, as I am aware that many modifications may be employed Without departing from the spirit of the invention.

Having thus described my invention, What I claim is 1. In a concentrator, the combination of a number of table-sections provided with curved riffles, and movable about a common center, means for sizing the material comprising a spiral screen arranged about the axis of the machine, and provided with parts having perforations of different sizes, amalgamatingplates arranged to receive the diiferent grades of material from the screen and discharge it upon the difierent table-sections.

2. In a concentrator the combination of a number of table-sections movable about a common center, and means located in the central space surrounded by the table-sections, for sizing the material and discharging the J different grades to the different table-sections.

3. In a concentrator, the combination of a This screen is constructed with refer-' numberof table-sections provided with curved riffles and movable about a common center, the sides of the table-sections farther from the center of motion being lowest, each table-section being provided with a trough extending along its end at one extremity of the riffles, means located in the central space surrounded by the table-sections, for sizing the material and discharging the different grades to the different table-sections, and means for imparting to the table a vibratory movement cal culated to carry the concentrates into the troughs, while the gangue is discharged over the lowermost riffies at the outer edges of the tables.

4. The combination of a number of distinct table-section s provided with curved rifiies and movable about a common center, the tablesections being disposed about a central space of suitable size, each table-section being provided with a trough at one extremity of the riffles, amalgamating-plates located in said central space, their number corresponding with the number of the table-sections, each plate being arranged to discharge upon a different tabie-section, sizing apparatus located above the amalgamating-plates and arranged to discharge the different grades of material upon the different plates, and means for imparting a vibratory motion to the table-sections whereby the concentrates caught by the riffies are discharged into the troughs at the extremities of the respective table-sections.

5. In a concentrator the combination of a number of table-sections movable about a common center, each table-section having a discharge for the concentrates at one extremity, and means located in the central space surrounded by the tablesections for sizing the material and discharging the diiferent grades to the different table-sections, and means for imparting to the tables a vibratory movement calculated to carry the concentrates to the discharge extremity of the tables, while the gangue is discharged over the edges of the tables farthest from the center of motion.

6. In a concentrator the combination of a number of table-sections provided with riflles, and movable about a common center, each table-section having a discharge for the concentrates at one extremity of the riffies, means located in the central space surrounded by the table-sections for sizing the material and discharging the differentgrades to the different table-sections, and means for imparting to each'table a vibratory movement calculated to carry the concentrates to the discharge extremity of the riffies.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID e. wHERRY.

Witnesses:

A. J. OBRIEN, GRACE MYTINGER. 

